Honda BF20 BF2A Outboard Motors Manual, Page 16Get this manual
IllMAINTENANCE1ENGINE OIL
EFSO.BF2A
4COMBUSTION CHAMBER 5VALVE CLEARANCE 6CARBURETOR
2GEAR OIL 3SPARK PLUG
1ENGINE OIL
CAUTION: contact with the skin for prolonged periodsAlthough this unlikely unless you handle used oil on daily basis, it adviseable to thoroughly wash your hands with soap and water as soon as possible after handling used oilDrain the oil while the engine is still warm to assure rapid and complete draining
[OIL FILLER CAP
1Turn the fuel valve lever OFF, and close the fuel cap vent
knob2Remove the oil filler cap, and turn the motor on side to drain the oil3Stand the engine in an upright position, and fill the crankcase with the recommended oilCheck the oil level with the dipstick resting on the filler opening (do not screw in)Fill to the upper level mark on the dipstick